Circuit Measures Diesel's Rotations Per Minute - 03/04/99 EDN-Design
Ideas....You may find it useful to measure a diesel engine's rotations per
minute to accurately adjust the idling or to compare the motor's speed under
hot and cold conditions, for example. Not all cars or trucks come with a
tachometer.... EDN is migrating links. This link is not verified.
Search the "title" + "EDN" for new link.

Digital Engine/Race Computer Board - The objective of this project is to
design a high speed digital engine tachometer. This requires the design and
development of a hardware and software solution to monitor the status of an engine in
real time. In addition, information relating to the overall health and systems of the
vehicle can be displayed. (added 10/05)

Digital Tachometer Avoids Analog Vices - 11/10/94 EDN-Design Ideas....The
digital tachometer in Fig 1a is a component of the digital seek servo loop in Fig 1b.
The loop produces an error signal that causes a motor to follow a sophisticated
velocity profile (Fig 2]. Although you could use an analog tachometer, the digital one
costs less, performs better, is less sensitive to temperature, and implements easier
in a custom IC.... [Design Idea by Tan Van Nguyen, IBM SSD Division, San Jose, CA]

Engine/Race Computer Board - The objective of this project is to design a
high speed digital engine tachometer. This requires the design and development
of a hardware and software solution to monitor the status of an engine in real time.
In addition, information relating to the overall health and systems of the vehicle can
be displayed. (added 10/05)

Optical Tachometer Provides BiDirectional Info - 05/21/98 EDN-Design
Ideas....Many systems, especially communications, require AGC that functions at 50
MHz. Self-calibrating systems, such as automatic test equipment, need this
high-frequency response but also require digital control of the AGC output voltage.
During the calibration cycle, the test equipment calculates the AGC output voltage
necessary to achieve....file has several circuits, pleaas scroll to find this one....
[Design Idea by Stephen Woodward, University of North Carolina, Chapel Hill]

Simple circuit measures diesel's rotations per minute - 03/04/99 Issue of
EDN You may find it useful to measure a diesel engine's rotations per minute to
accurately adjust the idling or to compare the motor's speed under hot and cold
conditions, for example. Not all cars or trucks come with a tachometer. The scheme in
Figures 1 and 2 allows you to measure....Page includes several designs. Scroll
to find this one....(EDN Design Ideas] [Design Idea by David Magliocco, CDPI,
Scientrier, France]

Tachometer Avoids Analog Vices - 11/10/94 EDN-Design Ideas....The digital
tachometer in Fig 1a is a component of the digital seek servo loop in Fig 1b. The loop
produces an error signal that causes a motor to follow a sophisticated velocity
profile (Fig 2]. Although you could use an analog tachometer, the digital one costs
less, performs better, is less sensitive to temperature, and implements easier in a
custom IC.... [Design Idea by Tan Van Nguyen, IBM SSD Division, San Jose, CA]

Tachometer Demodulator has Fast Response Time - 12/07/95 EDN-Design
Ideas.... When a tachometer is a critical part of overspeed-shutdown circuitry, the
response time of conventional demodulators may be too long. The circuit in the block
diagram in Figure 1 provides updated speed data. The circuit provides corrections for
variations in excitation amplitude and frequency.... EDN is migrating links. This link
is not verified. Search the "title" + "EDN" for new link.